Affiliation: | (1) Nokia China R&D Center, No. 10, He Ping Li Dong Jie, Beijing, 100013, P.R. China;(2) Nokia Research Center, NOKIA GROUP, P.O. Box 422, FIN-00045, Finland;(3) National Key Lab of Switching Technology and Telecommunication Networks, Beijing University of Posts & Telecommunications, P.O. Box 206, Beijing, 100876, P.R. China |